Apple’s recent press release indicates the following:
Each receiver takes advantage of the latest sound and video technologies — such as the latest high-bit-rate formats, including Dolby(R) TrueHD and DTS-HD Master Audio(TM) delivered via Blu-ray Disc(TM) and the HD video content stored on iPod and iPhone products — and incorporates them into a beautifully designed, easy-to-use system.
Rumors indicate Apple will reveal this sometime today at their Rock & Roll Event.